Frame for incandescent mantles.



PATBNTBD DEG. a, 1903.

E. LIPPITT4 FRAME FOR INGANDBSGBNT MANTLES.

APPLICATION FILED MAE, 2. 1903.

H0 MODEL.

Nits Starts Patented December 8, 1903.'

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ELIHU LIPPITT, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF 'IO GEORGE D.WI-IITCOMB OO., OF CHICAGO, ILLINOIS, A CORPORA- TION OF ILLINOIS.

FRAME FOR INCNDESCENT IVIANTLES.

SPECIFICATION forming part of Letters Patent No. 746,639, dated December8, 1903.

Application filed March 2, 1903.

To all whom it may concern:

Be it known that I, ELIHU LIPPITT, a citizen of the United States, and aresident of Chicago, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Frames for IncandescentMaut-les, of which the following is a specificacombustible materialincorporated into the framein its fabrication and the ends of which arecarried across the open end of the frame and secured to its oppositeside, so as to form a bail.

More specifically, it consists of such aframe having a circumferentialpocket Within Which such draw-stringis housed and of a plurality offrames fabricated together as a continuous tube with the draw-stringsinserted at proper places, so that when the several frames are separatedsuch strings will be at the ends thereof.

Preferably the mantle-frames are made in a continuously-connected orintegral series and provided at equidistant points, depending upon theintended length of the completed mantle, with integral pocketscontaining the bail-cords, and then eut up into units as desired. Whenso severed, the end of each unit in which the supporting-bail is locatedis gathered in to fashion the upper end of the frame to the shape of thecompleted mantle, and the loose ends of the cord are twisted, carriedover to the opposite side of the frame, and there secured by means of aneedle or other suitable implement.

The invention is more fully set forth in the foliowing description, andparticularly designated in the appended claims.

Referring to the drawings, Figure l illusy trates a plurality of theframes made in accordance With myinvention and before being cut up intounits, the lower endl of the ligure Serial No. 14:5.'759. (No model.)

frame shaped up into conventional form..

Fig. 3 relates to a detail, on an enlarged scale, of the bail-cordandthe integral pocket for retaining the same. Fig.' 4 is an enlargedsection on the line w x of Fig. 3, and Fig. 5 illustrates amodification.

Under the usual practice in attaching the bails to the frames beforetreatment With 0X- ids for producing the incandescent elements thestocking or tube of combustible fabric is eut into suitable lengths andthe bail then attached by folding over one end of the frame or forming ahem in which the bail-cord is placed, or by threading the ends of thecord into the Wall of the frame, or in some in` stances by knotting oneend of a cord and passing the other end through the contracted upper endof the mantle, so that the mantle is supported by the-knot. The presentinvention does away with such methods of attaehing the supportingbailsas a second or subsequentoperation-that is, after the completion of theframe, inasmuch as in its practice the bails are secured to the framesor forms during the fabricating of the latter.

The fabric from which the bodies, as 10, of the fram es are made may beknitted or woven into a continuous length or integral series of frames.I have shown the framesin the drawings as being knitted; but it is to beunderstood that the invention is not limited in this y pocket 11,Whiehis accomplished bya manipulation of the needles, as will be understoodby those skilled in the art to which the invention relates, the web isbrought around or back -upon itself; but before the pocket is closed,

as shown in Fig. 4, a strip of incombustible f cord, as asbestos, of alength a little greater than the perimeter of the tube, as will be seenon reference to Fig. 3, is placed or laid in the pocket, its ends beingbrought close together, and the pocket is then closed by a continuationof the knitting operation. Before treatment with the material or oxidsnecessary to produce the incandescent mantle the tube is cut up intoindividual frames close to the pocket, preferably leaving the selvageedge adjacent thereto. This Will leave but one free end of thread oryarn 13, which, being at the selvage edge, cannot pull out or unravelthe pocket.

In Fig. is illustrated a means for facilitating the separation of theunit-frames, consisting of an independent thread or strand 15, knittedinto and connecting the adjacent ends of successive frames. Thisindependent thread is incorporated in the stocking during thefabrication thereof and along the line Where the cut Would be made inthe tube. (Illustrated in Fig. l.) By pulling upon one end of thethread, so as to withdrawit, the separation of the tWo frames mayreadily be effected, the fabric being so made that a selvage edge isleft at the pocket. The end of the frame at which the bail is locatedmay then be gathered in, as shown in Fig. 2, the free ends of the cordbeing afterward twisted, as at 14.-, carried over to the opposite sideof the frame, and there secured by a needle or othersuitable implement,or the end may be left straight, if it be desired.

After having been given the required shape the mantle is treated in theusual manner and the fabric-frame burned away, leaving an incandescentshell or mantle having an incombustible bail securely attached thereto.

I do not claim, broadly, a mantle-body having its bail fabricated intoit, as such a structure was first invented by William C. Whitcomb andmyself and made the subject of an application for Letters Patent filedDecember 23, 1902, Serial No. 186,378.`

I claim as my inventionl. A frame for an incandescent mantle consistingof a tubular body of combustible material having an integral pocket, andan incombustible cord located in the pocket.

2. A frame for an incandescent mantle consisting of a tubular body ofcombustible material having a peripheral integral pocket, and anincombustible cord located in the pocket.

3. A frame for an incandescent mantle consisting of a tubular body ofcombustible material having aperipheral integral pocket, and anincombustible cord in the pocket and the ends of which protrude from thesame.

4. A frame for an incandescent mantle consisting of a tubular body ofcombustible material provided with a pocket extending entirely aroundthe Wall of the same, and an incombustible cord located in the pocketand having its ends brought close together and protruding from thepocket.

5. A frame for an incandescent mantle consisting of a tubular body ofcombustible material having an integral closed peripheral pocket at oneend, and a cord of incombustible material located in the pocket.

6. Aframe for an incandescent mantle consisting of a tubular body ofcombustible material having an integral closed peripheral pocket at oneend, a bail-cord of incombustible material located in the pocket and thesaid end being gathered in and the ends of the cord extended across theend of the body and secured to the opposite side thereof.

7. A frame for an incandescent mantle consisting of a knitted tubularbody of combustible material having an integral closed-pocket, and acord of incombustible material located in the pocket.

8. A frame for an incandescent mantle consisting of a knitted tubularbody of combustible material having an integral closed pocket at one endthereof and an incombustible cord located in the pocket, and having itsends brought together,and extended across the end of the frame andsecured to the opposite side of the same.

9. A continuously-connected or integral series of frames forincandescent mantles, provided With equidistant integral closed pockets,and a bail-cord of incombustible material located in each pocket.

l0. A continuously-connected orintegral series of knitted frames forincandescent mantles provided with equidistant integral peripheralpockets, and a bail-cord of incombustible material located in eachpocket and the ends of which are located close together and protrudefrom the pocket.

ll. A frame for an incandescent mantle consisting of a fabricatedtubular body, and a draw-cord of incombustible material arrangedcircumferentially thereof and incorporated into the body in thefabrication thereof.

ELIHU LIPPITT.

Witnesses:

ARTHUR B. SEIBOLD, Louis K. GILLsoN.

IOC

